Global Patent Index - EP 0898287 A3

EP 0898287 A3 19990331 -

Publication

EP 0898287 A3 19990331

Application

EP 98306472 A 19980813

Priority

  • JP 22686797 A 19970822
  • JP 23306897 A 19970828
  • JP 23528997 A 19970829
  • JP 23529097 A 19970829
  • JP 24993197 A 19970829
  • JP 24993597 A 19970829

Abstract (en)

[origin: EP0898287A2] The present invention provides a hard magnetic alloy is obtained by heat treatment, at a heating rate of 20 DEG C/min or more, of a glassy alloy containing Fe as a main component, at least one element R selected from the rare earth elements, at least one selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Cu, and B, and having a supercooled liquid region having a temperature width DELTA Tx of 20 DEG C or more, which is represented by the equation DELTA Tx = Tx - Tg (wherein Tx indicates the crystallization temperature, and Tg indicates the glass transition temperature), and a sintered compact, a cast magnet, a stepping motor and a speaker each of which includes the hard magnetic alloy.

IPC 1-7

H01F 1/057; H02K 37/00; H04R 1/00

IPC 8 full level

H01F 1/057 (2006.01); H02K 1/02 (2006.01); H04R 9/02 (2006.01); H02K 15/03 (2006.01); H02K 37/14 (2006.01)

CPC (source: EP US)

H01F 1/0571 (2013.01 - EP US); H01F 1/0577 (2013.01 - EP US); H02K 1/02 (2013.01 - EP US); H04R 9/025 (2013.01 - EP US); H02K 15/03 (2013.01 - EP US); H02K 37/14 (2013.01 - EP US)

Citation (search report)

  • [X] EP 0632471 A2 19950104 - SANTOKU METAL IND [JP]
  • [A] EP 0542529 A1 19930519 - SUMITOMO SPEC METALS [JP]
  • [E] EP 0867897 A1 19980930 - ALPS ELECTRIC CO LTD [JP], et al
  • [X] KOJI MA A ET AL: "STRUCTURAL AND MAGNETIC PROPERTIES OF NANOCRYSTALLINE FE-RICH FE-NB-ND-B SINTERED MAGNETS PRODUCED BY CONSOLIDATING AMORPHOUS POWDERS", IEEE TRANSACTIONS ON MAGNETICS, vol. 33, no. 5, PART 02, September 1997 (1997-09-01), pages 3817 - 3819, XP000703227
  • [A] PATENT ABSTRACTS OF JAPAN vol. 016, no. 423 (E - 1260) 7 September 1992 (1992-09-07)
  • [A] DATABASE WPI Section Ch Week 9536, Derwent World Patents Index; Class L03, AN 95-273107, XP002092150

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0898287 A2 19990224; EP 0898287 A3 19990331; EP 0898287 B1 20030521; DE 69814762 D1 20030626; DE 69814762 T2 20031204; KR 100320249 B1 20020219; KR 19990023782 A 19990325; US 6172589 B1 20010109

DOCDB simple family (application)

EP 98306472 A 19980813; DE 69814762 T 19980813; KR 19980033980 A 19980821; US 13814998 A 19980821